"Captain Courageous appeared in Banner Comics from issue 3 to 6 (September 1941 - March 1942); issue 6 was renamed Captain Courageous Comics. He then moved to the Ace title Four Favorites in issue 5 (May 1942) to 21 (January 1946). In 2008, Captain Courageous appeared in flashback in Project Superpowers 0. The one-shot Project Superpowers: Chapter Two Prelude shows the Captain as part of a group called The Super-Mysterymen." Read some of these great issues here!
I love me some Golden Age stuff!